MESON Chess Problem Database

Problem Display
PID: 247262 (B6K/6Q1/1N1ppp2/3pq1B1/1P1k4/3p2R1/1P1N4/8 w - - 0 1)

Pimenov, Sergey Ivanovich

Pimenov, Vitaly Ivanovich

Die Schwalbe, 1929

B6K/6Q1/1N1ppp2/3pq1B1/1P1k4/3p2R1/1P1N4/8

#2

9 + 7

SOLUTION

  • SOUND
  • Sets
    • 1...f5
      • 2.Be3#
  • Tries
    • 1.Rg4+?
      • 1...Qe4
        • 2.Sf3#
      • 1...Qf4!
  • Keys
    • 1.Sbc4!
      • threat
        • 2.Qa7#
      • 1...dxc4
        • 2.Sf3#
      • 1...fxg5
        • 2.Rg4#
      • 1...f5
        • 2.Be3#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 2
    • REMOVED MATES = 0
  • Sets
    • P(g);P_PINQ(G),P_SPINQ(d)::B(E)
  • Tries
    • Try
      • R(C);CHECK
      • Vars
        • Q(d);P_SPINP(g),P_SPINQ(d)::S(B)
      • Refutation
        • Q(d);P_SPINP(g),P_SPINQ(d)
  • Actual
    • S(F);
    • Threat
      • QAB(G)
    • Vars
      • P(c);SBLOCK,XS(F)::S(B)
      • P(g);P_PINQ(G),P_SPINQ(d),XB(E)::R(C)
      • P(g);P_PINQ(G),P_SPINQ(d)::B(E)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).